Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0cda0658206ad2f…

MALICIOUS

PDF

44.0 KB Created: 2020-10-01 06:49:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 169b13987ae7fd4d5d646cb2a5ae0052 SHA-1: 3fb8733e51aaabafa9e7a658bdfb5878e1cda2e5 SHA-256: f0cda0658206ad2fd92c4a272f899d73caad79a4664c0448e4bf44d0395a3980
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/strik?keyword=brokenness+book+pdf In PDF document text
    • http://files.karuklanguageresources.org/uploads/1/3/1/3/131383483/jejibomirexod.pdfIn PDF document text
    • http://jixosak.kansascitywriters.com/uploads/1/3/0/7/130738706/8241048.pdfIn PDF document text
    • http://ritovigiw.polevaulter.org/uploads/1/3/0/9/130968921/radapezusodi.pdfIn PDF document text
    • http://files.aretelandscape.com/uploads/1/3/0/7/130739274/5247708.pdfIn PDF document text
    • http://gesurusez.childneurologyconsulting.com/uploads/1/3/1/3/131379737/tiwakexetaritufo.pdfIn PDF document text
    • http://files.indystreetrodsandclassics.com/uploads/1/3/2/3/132303170/lukolotexezuwugokufi.pdfIn PDF document text
    • http://ritusigid.runninonfaithtc.org/uploads/1/3/0/7/130775358/7634734.pdfIn PDF document text
    • http://files.globalpentorch.net/uploads/1/3/0/7/130739746/voninomiveta-ramof-polexukogefu.pdfIn PDF document text
    • http://tigofel.weisbeckerscholarshipfund.com/uploads/1/3/0/7/130739107/5f560ddac2d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4845/9675/files/xujusagen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0324/0871/files/36766240957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4676/2656/files/ubiquiti_networks_uap-_ac-_lite_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0102/6472/files/komimupimoguweluwosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/virawovidigepifizebepab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4232/7707/files/zomilonuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/57561120137.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6224 4704 bytes
SHA-256: cb91cf6b511c3a87eff650c23f885306285686d0dff6d3e136c0397c8f3a49ea
font_01_sfnt_off0000721b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x721B 10088 bytes
SHA-256: d34c073fb90b04bb04c82e13da10ab75e71befadbb5d9c953e17388242a30810
font_02_sfnt_off0000949b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x949B 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176